Science SPORE Prize
November 2011
The Open Source Physics Project is supported by NSF DUE-0442581.
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Using hardware
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Using Arduino boards with EJS
- Feb 2 at 11:55AM
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Francisco Esquembre
72 Posts
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EJS has now new a Model Elements to control Arduino boards.
The best way to learn how to use it is to inspect an examples. See attached zip with an example.
Before you start, you need to download and install Arduino standard software from http://arduino.cc/en/Main/Software. This allows you to install the drivers for your computers AND install in your Arduino board the script StandardFirmata. Both things are a must before using the example attached. You install the script by running the Arduino software and selecting "File->Examples->Firmata->StandardFirmata. Then, click the "Upload" icon (looks like a small right arrow) in the task bar of the Arduino software. This step needs to be done only once (per board).
Now, open the attached Arduino example in the latest EJS and inspect the example (in particular, the Model -> Elements tab).
You need additional hardware for making things work. The boards just act as I/O boards. Whatever software you attach to them makes the real work. But if you are playing with these boards, you know this already.
Good luck!
Paco
Attached File: ejs_Arduino_LedTempServo.zip
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Re: Using Arduino boards with EJS - Mar 25 8:03PM
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Diego Racero
9 Posts
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Hi Franciso, I`m now experimenting wiht Arduino Leonardo and I have a question.
In your example you're using linux and the following sentence
arduino.connectSerial("/dev/tty.usbmodem1421")
Should ¡ld I replace It for
arduino.connectSerial("COM6")?
Because I'm using windows and my Arduino board was installed in COM6 and connected through USB port.
Thank in advance for your help.
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Re: Re: Using Arduino boards with EJS - Mar 26 3:45AM
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Francisco Esquembre
72 Posts
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Yes, that should be it. Remember to install the Arduino drivers.
I don't think we have tested the Leonardo board, though...
Paco
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Re: Re: Re: Using Arduino boards with EJS - Mar 27 8:48AM
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Diego Racero
9 Posts
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Paco, thank you for your help. I replaced the line you suggested and It works perfectly well.
I used the temperture example but with some modifications because I´m tryin to perform a remote laboratory turning on and turning off a laser diode and illuminate a difraction slit.
Now I´m moving to work in the Moodle integration.
Surely I´ll be requesting for your help again.
Thank you very much in advance for that.
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